Fig. 2From: Effect of ambient fine particulates (PM2.5) on hospital admissions for respiratory and cardiovascular diseases in Wuhan, ChinaDistribution of individual PM2.5 exposures on the day of admission. Data points represent the PM2.5 concentrations of individuals. The density plot on the right margin of the y-axis visualizes the distribution of the number of subjects over the PM2.5 concentration. The dashed lines denote the Grade II criteria set by the Chinese AQS (75 μg/m3) and the WHO AQG (25 μg/m3)Back to article page